Diagnostic instrument for medical or laboratory purposes



FIG. 1 is a top, front right perspective view of a diagnostic instrument for medical or laboratory purposes showing my new design.

FIG. 2 is a right side elevation view thereof, with the left side elevation view being a mirror image of the right side elevation view.

FIG. 3 is a front elevation view thereof.

FIG. 4 is a top, front left perspective view thereof; and,

FIG. 5 is a top front perspective view thereof. 

CLAIM The ornamental design for a diagnostic instrument for medical or laboratory purposes, as shown and described. 